private void onTestStateChanged(object sender, TestStateEventArgs e) { switch (e.State) { default: case TestState.Nothing: testStatePanel.BackColor = Color.Transparent; break; case TestState.Unknown: testStatePanel.BackColor = Color.RoyalBlue; break; case TestState.Fail: testStatePanel.BackColor = Color.Red; break; case TestState.Pass: testStatePanel.BackColor = Color.LightGreen; break; } }